Is CVE-2021-27218 in the CISA KEV catalog?

No. CVE-2021-27218 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-27218?

CVE-2021-27218 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-27218?

CVE-2021-27218 has an EPSS score of 4.19% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-27218?

Upgrade glib2.0 on debian 11 to 2.66.7-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-27218

HIGHEPSS 90th pctl

7.5

CVSS v3

NVD

Description

An issue was discovered in GNOME GLib before 2.66.7 and 2.67.x before 2.67.4. If g_byte_array_new_take() was called with a buffer of 4GB or more on a 64-bit platform, the length would be truncated modulo 2**32, causing unintended length truncation.

CWE-681

How to fix

Remediation Available

glib2.0Debian

Fixed in:2.66.7-1CVE-2021-27218

glib2.0Ubuntu

Fixed in:2.48.2-0ubuntu4.7USN-4759-1

Fixed in:2.56.4-0ubuntu0.18.04.7USN-4759-1

Fixed in:2.64.6-1~ubuntu20.04.2USN-4759-1

libglib2.0-0Ubuntu

Fixed in:2.48.2-0ubuntu4.7USN-4759-1

Fixed in:2.56.4-0ubuntu0.18.04.7USN-4759-1

Fixed in:2.64.6-1~ubuntu20.04.2USN-4759-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

4.19%probability of exploitation in 30 days

90thpercentile

Elevated risk: more likely to be exploited than 90% of all known CVEs.

References

Patch2

Third-Party Advisory3

Other references5

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.